Task statck is decreasing when switching the task

When I used FreeRTOS on RH850, I find when switching the task, the task statck is decreased, why?

Task statck is decreasing when switching the task

We don’t provide an RH850 port ourselves, so I’m afraid I don’t know. Other people have reported RH850 problems before, so I would recommend searching the forum to see if you have the same issue (and hopefully solution).